J/ApJ/832/125 BVRI photometric obs. of the PNe NGC 6337 & Sp 1 (Hillwig+, 2016)
Observational confirmation of a link between common envelope binary interaction
and planetary nebula shaping.
Hillwig T.C., Jones D., De Marco O., Bond H.E., Margheim S., Frew D.
<Astrophys. J., 832, 125-125 (2016)>
=2016ApJ...832..125H 2016ApJ...832..125H (SIMBAD/NED BibCode)
ADC_Keywords: Planetary nebulae ; Photometry, UBVRI
Keywords: binaries: close; planetary nebulae: general;
planetary nebulae: individual: NGC 6337, Sp 1
Abstract:
A current issue in the study of planetary nebulae with close binary
central stars (CSs) is the extent to which the binaries affect the
shaping of the nebulae. Recent studies have begun to show a high
coincidence rate between nebulae with large-scale axial or point
symmetries and close binary stars. In addition, combined binary-star
and spatiokinematic modeling of the nebulae have demonstrated that all
of the systems studied to date appear to have their central binary
axis aligned with the primary axis of the nebula. Here we add two more
systems to the list, the CSs and nebulae of NGC 6337 and Sp 1. We show
both systems to be low inclination, with their binary axis nearly
aligned with our line of sight. Their inclinations match published
values for the inclinations of their surrounding nebulae. Including
these two systems with the existing sample statistically demonstrates
a direct link between the central binary and the nebular morphology.
In addition to the systems' inclinations we give ranges for other
orbital parameters from binary modeling, including updated orbital
periods for the binary CSs of NGC 6337 and Sp 1.
Description:
We utilize the orbit-resolved B, V, and R photometry from
Hillwig+ (2010, J/AJ/140/319) for the central star of NGC 6337. The
photometry is presented in differential magnitudes via single star
differential photometry, with two additional comparison stars used to
confirm that our first comparison star is not photometrically
variable.
Photometric variability of the nucleus of Sp 1 was originally
discovered in 1988 by H. E. Bond. Observations in B,V,R, and I were
made by H. E. Bond on the CTIO 0.9m telescope during five observing
runs in 1988-1990, and a preliminary photometric period of 2.91 days
was reported in Bond & Livio (1990ApJ...355..568B 1990ApJ...355..568B). The full data have
not been published previously but are presented here.
Also included are new data from a number of telescopes: I-band data
from the 0.6 m SARA telescope at CTIO (SARA-CT) in 2010 and 2011; V-,
R-, and I-band photometry from the CTIO 0.9m and 1.3m telescopes in
2009; and more I-band data from the South African Astronomical
Observatory in 2010.
We also obtained orbit-resolved spectroscopy for both central stars
using the Gemini South telescope and the GMOS-S instrument (wavelength
range from 4000 to 5460Å).
Objects:
-----------------------------------------------------------------
RA (ICRS) DE Designation(s) (Period)
-----------------------------------------------------------------
17 22 15.66 -38 29 03.5 NGC 6337 = PN H 1-10 (P=0.173613)
15 51 40.95 -51 31 28.5 Sp 1 = PN Sp 1 (P=2.9061)
-----------------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 74 60 Differential magnitudes of the central star
of NGC 6337
table2.dat 108 1068 Apparent magnitudes of the central star of Sp 1
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See also:
B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014)
B/cb : Cataclysmic Binaries, LMXBs, and related objects (Ritter+, 2004)
J/A+A/580/A19 : Hen 2-155 & Hen 2-161 photometry & spectroscopy (Jones+, 2015)
J/A+A/563/L10 : BD+33 2642 & HD 112313 radial velocities (Van Winckel+, 2014)
J/MNRAS/440/2036 : VPHAS+ survey synthetic colours (Drew+, 2014)
J/A+A/531/A172 : Central stars of planetary nebulae. II. (Weidmann+, 2011)
J/A+A/526/A6 : Central stars of galactic planetary nebulae (Weidmann+, 2011)
J/AJ/140/319 : BVR light curves of NGC 6026 and 6337 (Hillwig+, 2010)
J/ApJ/714/1096 : Galactic planetary nebulae (Stanghellini+, 2010)
J/A+A/496/813 : Binary PNe towards the Galactic bulge (Miszalski+, 2009)
J/ApJ/689/194 : Distances of galactic planetary nebulae (Stanghellini+, 2008)
J/A+A/475/217 : Classification of planetary nebulae (Quireza+, 2007)
J/A+AS/132/13 : Planetary nebulae radial velocities (Durand+ 1998)
J/A+A/327/736 : Planetary nebulae properties (Stasinska+ 1997)
J/A+AS/94/399 : Absolute fluxes and distances of PN (Cahn+, 1992)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.5 d B-HJD ? Heliocentric Julian Date of B magnitudes
(HJD-2450000)
12- 16 F5.3 mag Bdiff [2.1/2.6]? Differential B magnitude (1)
20- 24 F5.3 mag e_Bdiff [0.003/0.007]? Uncertainty on Bdiff
28- 37 F10.5 d V-HJD Heliocentric Julian Date of V magnitudes
(HJD-2450000)
39- 43 F5.3 mag Vdiff [1.9/2.5] Differential V magnitude (1)
45- 49 F5.3 mag e_Vdiff [0.002/0.005] Uncertainty on Vdiff
51- 60 F10.5 d R-HJD ? Heliocentric Julian Date of R magnitudes
(HJD-2450000)
62- 66 F5.3 mag Rdiff [1.8/2.3]? Differential R magnitude (1)
70- 74 F5.3 mag e_Rdiff [0.003/0.005]? Uncertainty on Rdiff
--------------------------------------------------------------------------------
Note (1): Data originally obtained and described in
Hillwig+ (2010, J/AJ/140/319). See the "Description" section above.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.4 d B-HJD ? Heliocentric Julian Date of B magnitudes
(HJD-2450000)
12- 17 F6.3 mag Bmag [14.3/14.6]? Apparent B magnitude (1)
20- 24 F5.3 mag e_Bmag [0.002/0.02]? Uncertainty on Bmag
28- 38 F11.5 d V-HJD ? Heliocentric Julian Date of V magnitudes
(HJD-2450000)
40- 45 F6.3 mag Vmag [13.8/14.1]? Apparent V magnitude
48- 52 F5.3 mag e_Vmag [0.002/0.01]? Uncertainty on Vmag (1)
56- 65 F10.4 d R-HJD ? Heliocentric Julian Date of R magnitudes
(HJD-2450000)
67- 72 F6.3 mag Rmag [13.5/13.8]? Apparent R magnitude
75- 79 F5.3 mag e_Rmag [0.001/0.02]? Uncertainty on Rmag (1)
83- 93 F11.5 d I-HJD ? Heliocentric Julian Date of I magnitudes
(HJD-2450000)
95-100 F6.3 mag Imag [13.1/13.5]? Apparent I magnitude
103-108 F6.4 mag e_Imag [0.001/0.02]? Uncertainty on Imag (1)
--------------------------------------------------------------------------------
Note (1): Data originally obtained and described in
Bond & Livio (1990ApJ...355..568B 1990ApJ...355..568B).
See the "Description" section above.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 21-Feb-2017